Expandablelistview 简单使用

最新推荐文章于 2025-04-18 11:39:31 发布

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最新推荐文章于 2025-04-18 11:39:31 发布

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分类专栏： Android开发

本文链接：https://blog.youkuaiyun.com/LauraChen93/article/details/54893382

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本文详细介绍如何使用Android中的ExpandableListView组件。通过实例演示了如何创建并填充数据到可展开列表视图，包括定义布局文件、设置适配器及实现BaseExpandableListAdapter的方法。

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Expandablelistview是可展开的listview,通过点击一层title获取对应title下面的content，着重点是ExpandableListViewaAdapter里面各个方法的使用。ExpandableListViewaAdapter中包括父、子 listview的count、id、view等，因此理解好ExpandableListViewaAdapter了，就可以很好使用Expandablelistview了。

下面我把效果图以及源码贴下来供大家阅读：

首先是activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="demoone.yizooo.com.expandablelistviewdemo_02.MainActivity">

    <ExpandableListView
        android:id="@+id/expendlist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></ExpandableListView>
</RelativeLayout>

其次是 expendlist_group.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:background="#ffffff">
    <!--扩展ListView的头List布局文件-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:orientation="horizontal"
        android:gravity="center_vertical">
    <TextView
        android:id="@+id/txt"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="title"
        android:textSize="14sp"
        android:textColor="#333333"
        android:layout_marginLeft="10dp"/>

    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/right"
        android:layout_marginRight="10dp"/>
    </LinearLayout>
</LinearLayout>

其次是 expendlist_item

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:background="#eeeeee" >
    <!--扩展ListView的子List布局文件-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:orientation="horizontal"
        android:gravity="center_vertical">
    <TextView
        android:id="@+id/txt"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="13sp"
        android:textColor="#333333"
        android:text="Name"
        android:layout_marginLeft="10dp"/>
        <ImageView
            android:id="@+id/img"
            android:layout_width="20.0dp"
            android:layout_height="20.0dp"
            android:src="@drawable/duigou"
            android:layout_marginRight="10dp"/>
    </LinearLayout>

</LinearLayout>

最后是MainActivity

public class MainActivity extends Activity {

    private ExpandableListView expandableListView;
    private List<String> group_list;
//    private List<List<String>> item_list;
    private List<List<Integer>> item_list2;
    private HashMap<String, List<String>> map;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //title
        group_list = new ArrayList<String>();
        group_list.add("总经理");
        group_list.add("监管");
        group_list.add("财务");
//
//        //item
//        item_list = new ArrayList<List<String>>();
//        item_list.add(group_list);
//        item_list.add(group_list);
//        item_list.add(group_list);

        map = new HashMap<String, List<String>>();

        List<String> list1 = new ArrayList<String>();
        list1.add("Name_01");
        map.put("总经理", list1);

        List<String> list2 = new ArrayList<String>();
        list2.add("Name_02");
        map.put("监管", list2);

        List<String> list3 = new ArrayList<String>();
        list3.add("Name_03");
        list3.add("Name_03");
        list3.add("Name_03");
        map.put("财务", list3);

        List<Integer> tmp_list = new ArrayList<Integer>();
        tmp_list.add(R.drawable.duigou);
        tmp_list.add(R.drawable.duigou);
        tmp_list.add(R.drawable.duigou);

        item_list2 = new ArrayList<List<Integer>>();
        item_list2.add(tmp_list);
        item_list2.add(tmp_list);
        item_list2.add(tmp_list);

        expandableListView = (ExpandableListView) findViewById(R.id.expendlist);
        //设置 属性 GroupIndicator 去掉默认向下的箭头
        expandableListView.setGroupIndicator(null);
        expandableListView.setAdapter(new MyExpandableListViewAdapter(this));
    }

    //用过ListView的人一定很熟悉，只不过这里是BaseExpandableListAdapter
    class MyExpandableListViewAdapter extends BaseExpandableListAdapter {

        private Context context;

        public MyExpandableListViewAdapter(Context context) {
            this.context = context;
        }

        @Override
        public int getGroupCount() {
            return group_list.size();
        }

        @Override
        public int getChildrenCount(int groupPosition) {
            //return item_list.get(groupPosition).size();
            String key = group_list.get(groupPosition);
            int size = map.get(key).size();
            return size;
        }

        @Override
        public Object getGroup(int groupPosition) {
            return group_list.get(groupPosition);
        }

        @Override
        public Object getChild(int groupPosition, int childPosition) {
            //return item_list.get(groupPosition).get(childPosition);
            return childPosition;
        }

        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded,
                                 View convertView, ViewGroup parent) {
            GroupHolder groupHolder = null;
            if (convertView == null) {
                convertView = (View) getLayoutInflater().from(context).inflate(R.layout.expendlist_group, null);
                groupHolder = new GroupHolder();
                groupHolder.txt = (TextView) convertView.findViewById(R.id.txt);
                // groupHolder.img = (ImageView) convertView
                // .findViewById(R.id.img);
                convertView.setTag(groupHolder);
            } else {
                groupHolder = (GroupHolder) convertView.getTag();
            }
            groupHolder.txt.setText(group_list.get(groupPosition));
            return convertView;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition,
                                 boolean isLastChild, View convertView, ViewGroup parent) {
            ItemHolder itemHolder = null;
            if (convertView == null) {
                convertView = (View) getLayoutInflater().from(context).inflate(R.layout.expendlist_item, null);
                itemHolder = new ItemHolder();
                itemHolder.txt = (TextView) convertView.findViewById(R.id.txt);
                itemHolder.img = (ImageView) convertView.findViewById(R.id.img);
                convertView.setTag(itemHolder);
            } else {
                itemHolder = (ItemHolder) convertView.getTag();
            }
            //itemHolder.txt.setText(item_list.get(groupPosition).get(childPosition));
            String key = MainActivity.this.group_list.get(groupPosition);
            itemHolder.txt.setText(map.get(key).get(childPosition));
            itemHolder.img.setBackgroundResource(item_list2.get(groupPosition).get(
                    childPosition));
            return convertView;
        }

        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }

    }

    class GroupHolder {
        public TextView txt;
        public ImageView img;
    }

    class ItemHolder {
        public ImageView img;
        public TextView txt;
    }
}